Improvement in valves for engines



UNITEE STATES PATENT CEEIGE.

SAMUEL F. COLE AND NELSON S. BOVVDISH, OF EICHFIELD SPRINGS, N. Y.

IMPROVEMENT IN' VALVES FOR ENGINES.

Specication forming part of Letters Patent No. 154,585, dated September 1, 1874; application tiled December 11, 1873.

To all whom 'it may concern:

`Be it known that we, SAMUEL F. COLE an NELSON S. BowDIsH, of Richfield Springs, in the county of Otsego and State ot' New York, have invented an Improvement in Valves for Engines, of which the following is a specification a valve-chest, one to act as an ordinary steamvalve and the other as a eut-off, and the cutoi' valve received its motion from the steamvalve, and was not adapted to reversing the engine, as in my arrangement of valves and ports. A disk has also been applied between a stationary valve-seat and the surface ot' an oscillating engine; but such disk was not inclosed in the valve-chest. v

In the drawing, Figure l is a sectional plan of the valves and chest. Fig. 2 is a vertical section. Fig. 3 shows the reversing-valve and ports, and Fig. 4 the engine-valve and ports.

The ports a and b lead to the steam-cylinder c, in any usual manner, and they open at their outer ends into the steam-chest d, that is cylindricahhaving a circular or disk valve, e, upon a stem, f, that is operated by an eccentric on the engine-shaft, or otherwise, and in this cylindrical steam-chest is a partition, h, with ports 2 and 3. The reversing-valve l is at the other side of the partition h, between that and the head k. The head is secured in place by bolts 4, and the parts may be sufficiently adjustable to allow for wear. This head k is shown in plan view, Fig. 5. The valve l is provided with a tubular stem, n, and the proper glands or packing-boxes are provided at the respective stems, if required. Each valve 1s made with segmental openings, as seen in Figs. 3 and 4, and the steam-pipe o and exhaust-pipe q are connected to the head 7c in line, or nearly so, with the ports a and b; but the ports 2 and 3 in the partition h are intermediate at or about ninety degrees from such. ports a and b; hence when the valve l is in the position shown in Fig. 3, the port 5 therein forms a channel between the steam-pipe o and the port 2, and the other segmental port 6 forms a channel between the exhaust-pipe q and the port 3'. When this valve Z is partially rotated to the position shown by dotted lines in Fig. 3, the connections are reversed, and steam passes to the port 3, and the exhaust is by the port 2.

The valve-stem m may be provided with a hand-lever, or otherwise iitted so as to be moved, and the width ot' the valve between the ports 5 and 6 being sutlicient to cover the ports 2 and 3, the engine may be stopped by closing the said ports.

The steam-valve eis similar to the reversing-valve l, and it has the ports or segmental openings 9 and 10, and to said valve an oscillating or partially -revolving movement ot' about ninety degrees is given, so as to open the communication alternately between the ports a and b to the cylinder, and the ports 2 and 3 in the partition h, so 'as toallow the steam to act first on one side and then on the other ot' the engine-piston, and according to which way the valve l is placed, so steam will be supplied through either the port 2 or the port 3, and the engine will revolve in either one direction or the other.

We claim as our invention- '.llhe disk-valves e and l in the steam-chest, and at opposite sides of the partition h, and provided with the tubular stem n and stem f, in combination with the ports a and b, 2 and 3, and steam and exhaust pipes o q, arranged and operating substantially as set forth.

Signed by us this 26th day ot' November, A. D. 1373. y

SAMUEL F. COLE.

, N. S. BOWDISH.

Wtnesses: WILLARD A. SMITH, IRA STARKWETHER. 

